Alarm or acoustic apparatus.



E. RUBES.

ALARM OR AGOUSTIO APPARATU APPLICATION FILED T113111 Patented Aug". 13, 1912.

. in; all whom it may concern:

a devices now ordinarily employed and with UN TED STATES. PATENT OFFICE.

ERNEST RUIBES, OF BROOKLYN, NEW YORK.

ALARM OR ACOUSTIC AI PPARATUS.

- Be it known that I, Ennns'r Roars, a

citizen of the United States, residing at 'an apparatus or device of the class specified having materially increased sound volume and characteristics ascompared to similar in minimized dimensions. a

A furthenobjectof the invention is to dispense with the useof a plate diaphragm-or the form of diaphragm ordinar1ly adopted .as the sound or tone producing medium and to substitute therefor what may be termed an acoustic chamber of such construction as to give an increased volume of sound when actuated by cooperating means. I

The invention primarily consists of an acoustic chamber or sound box in combination with a movable member engaging a portion of the chamber, and a rotary motor, preferably electric, for actuating said member.

The invention further consists in the details of construction and arrangement of the several parts which will be more fully hereinafter described and claimed.

In the drawing: Figure 1 is a sectional view showing parts in elevation of the improved acoustic apparatus or warning signal device. Fig. 2is a similar view of a modified form of construction. Fig. 3 is a similar view of a further modified form.

The: improved apparatus or signal device essentially comprises three main elements in its organization, namely, an acoustic chamher 5, -a. sound producing member 6 cooperating with a portion of said chamber, and a rotary motor 7. The acoustic chamber 5 as shown embodies a closed side 5 and a sound emitting opening 5 in the center of the side opposite the said closed side, the chamber or box 5 being peripherally secured by suitable means within a casing 9 and having a rejection 10 on the closed side exteriorly o the said chamber or box, as shown by- Figs. 1 and 2, and located interiorly of Specification of Letters Patent.

Application-filed January 11, 1911; Serial No. 602,001.

- jected Patented Aug. 13, 1912.

the chamber or box as illustrated by Fig. 3. The rotary motor 7 is preferably of the electrio t-vpeand has the armature shaft 8 protherefrom and provided with the member 6 which in the present instance consists of a toothed disk or wheel having its .toothed periphery held continually "in engagement with the projection 10. As shown is disposed vertically, whereas in-Fig. 2 the said armature shaft is arranged horizontally or in a plane at right angles to the acoustic chamber or sound box 5, the motor. and armature shaft being inclosed within. the casing 9 in rear' of the chamber or sound box'. As shownby Fig. 3, the armature shaft 8 of the motor 7 is projected through the casing 9 into the acoustic chamber or box 5 and the member 6 thereon operates in advance of the closed side 5'.

The actuating member 6, as shown by Fig.

2, has one face thereof provided with radialteeth or projections 11 which cooperate with the-projection 10 on the sound box in the same manner as the similar members shown pytiigs. 1 and 3 provided with peripheral ee v It will be understood that the acoustic chamber or sound box is secured. only at its periphery at intervals, the latter being shaped in-curved lines or is of semicircular form so as to avoid interference with or obstruction to the movement of the sound waves produced by the closed side and projected forwardly toward the free wall 12 surroundingthe opening 5", the said wall being rendered responsive and also vibrated through the fluid orair contained within the acoustic chamber between the side 5 and the wall 12. It may be said that practically all of the parts of the acoustic chamber or box 5 are caused to vibrate by the contact of the member 6 with'the projection 10 except at the points where the chamber is periphorally secured .to the casing 9. Inother WOIC s, the acoustic chamber or sound box is y Fig. 1, the armature shaft 8- of the motor free to vibrate throughout its whole area except at the points where it is peripherally secured, in a manner similar to the'sound box or body of a musical instrument, and the aggregate vibrations produce a barmonious sound or tone having considerable Ii volume. and pleasing to the ear in contra- I distinction to the limited vibrations and in- Y harmonious sound produced by similar acti1- ation of a peripherally confined diaphragm J or acoustic plate. As a means for conveying the sound from 'the casing as produced by the acoustic chamber, it is preferred that a resonator 13 be applied to the front portion of the 'casing in advance of the said 5 chamber, and it will be understood that this resonator me he of any desired contour and construction' A simplified mode of ap-,

plying the resonator 13 is shown, and'consists in removably engaging the rear extremitythereof with theterminal of'a fore Wardly projectin part 14 of the casing, as

at 15.v It will a so be understood that in the form of the device shown by Fig. 3 the motor '1 will be attached directly to the 15 lower portion of the casing and the arma.--

ture shaft 8 in this instance will also preferably extend through a sleeve 16 to efi'ect an eflicient operation 0t said shaft.

One of the main advantages of the im- 20 proved alarm or warning signal is that it may be effectively operated with considerably less energy than is required in similar devices, now in use embodying a diaphram or acoustic plate confined at the periphery a-nd consisting only of a single vibrating medium prplate, for the reason that the vibrating members or elements of the said chamber are free from securing devices and outof contact with relation to supporting means and their vibration is, therefore untrammeled. A further advantageis that the acoustic chamber or sound box in accordance with the present inventionhas no openings 1 formed in and fastening means engaging any of its vibrating members and therefore the maximum vibrating properties of the chamber or sound box are con served and materially increase the sound volume of the alarm or signal device as a whole.

- To prevent the retention of moisture within the casing and consequent oxidizing 1n]ury to the acoustic chamber or sound box and cooperating parts, a suitable drainopening or outlet means 17 is formed in the bottom of the casing or at the lowest point of the latter so as to eitcctively carry off water that may collect within the casing.

l/Vhat is claimed is: l

- 1. In an acoustic apparatus or signaling device, a casing having a resonator secured thereto, in combination withan acoustic chamber inclosed within and structurally independent of the casing and composed as an entirety of sound producing material,

the periphery of the chamber being of sem1- circular form in cross-section and secured only at intervals, and a rotary electric motor carrying a rotary toothed member which is l-69 held in. engagement with a portion of said '3 chamber to set up a constant vibration I thereof.

2. In an acoustic apparatus or signaling device, a casing having aresonator, 111 combination with an acoustic chamber-inclosed constant vibration thereof, an electric ro- I tary motor for operating said member.

3. In an acoustic apparatus or signaling device, a casing having a resonator, in combination with aniacoustic chamber inclosed Within andstructurallyindependent of the casing and. composed as an entirety of sound producing material, the periphery of the chamber being of semicircular'form in cross-section, and secured only at inter vals,. the acoustic chamber being providedwith' a completely closed side and a side opposite thereto havinganopening therein,

both sides being vertically disposed and coni centric with the resonator, a rotary member engaging theclosed side of the chamber to set up a constant vibrationthereof, and arc-- tary electric motor for operating said member.

4; In an acoustic apparatus or signaling device, an exterior. casing having. a resonw' tor secured thereto, 1n comb nation with an acoustic chamber. fullyinclosedhy said-case ing, the chamber being secured to the casing at the peripherybetweenthe front-end rearsides of the chamber at intervals, and a ro-' ber mounted upon the armature shaft an engaging one side ofthe chamber.

tary electric motor having a projecting;

armature shaft,'and arotary toothedmem 5.. In an acoustic apparatus or signaling-1 device, a casing having a resonator, in com; bination with an acoustlc chamber fully inclosed by and peripherally secured at in- .tcrvalswithin the casing and provided with a completely closed side and an; opposing side havinga'n opening therein, the perlph cry of thdchamber being semicircular in cross-section," a movable member engaging the center of the closed side of the chamber,

and a rotary electric motor .for operating said movable member.

In testimony whereof I have herennto set my hand in presence of two subscribing witnesses. ERNEST RUBES. Witnesses: I

Rosa M. Snrro1v, CHAS. A. Rowe. 

